thank you for your bug report, the difference seems to be
"+application/x-scratch-project=scratch.desktop"
the issue is with "scratch" which does: "debian/postinst: echo "application/x-scratch-project=scratch.desktop" >> $DEFAULTS"
that's buggy, they shouldn't be changing conffiles from the postinst this way but rather get desktop-file-utils patched with the default added there
thank you for your bug report, the difference seems to be
"+application/ x-scratch- project= scratch. desktop"
the issue is with "scratch" which does: x-scratch- project= scratch. desktop" >> $DEFAULTS"
"debian/postinst: echo "application/
that's buggy, they shouldn't be changing conffiles from the postinst this way but rather get desktop-file-utils patched with the default added there